Nasimul Bari - Academia.edu (original) (raw)

Papers by Nasimul Bari

Research paper thumbnail of Allelopathic Potential of Sunflower Extract on Weed Control and Wheat Yield Under Subtropical Conditions

International Journal of Applied Agricultural Sciences, 2016

A field experiment was conducted to evaluate the effect of sunflower plant extract on weed contro... more A field experiment was conducted to evaluate the effect of sunflower plant extract on weed control and productivity of wheat. Dried and fresh sunflower plant extracts (SPE) were applied @ 5 t ha-1 and 10 t ha-1 at pre-and post-emergence of weeds in wheat plots. In addition, weed free, manual weeding and unweeded control treatments were also imposed in the experiment. Application of fresh SPE @ 10 t ha-1 at post-emergence contributed to the highest weed control efficiency, next to manual weed control treatment throughout the crop growing period. This treatment showed the highest weed control efficiency of 49.71% and 53.41% at 45 and 60 days after sowing, respectively. Application of fresh SPE @ 5 t ha-1 at post-emergence was found to be beneficial on the growth and development of wheat compared to other treatments. Apart from weed free and unweeded situations, the highest grain yield of 3.91 t ha-1 was recorded in the treatment receiving fresh SPE @ 5 t ha-1 applied at post-emergence. The study further suggested that the application of fresh sunflower plant extract @ 5 ha-1 during post-emergence might be considered as a viable alternative to traditional weed management practices under subtropical environment.

Research paper thumbnail of Salicylic Acid Improves Agro-Morphology, Yield and Ion Accumulation of Two Wheat (Triticum aestivum L.) Genotypes by Ameliorating the Impact of Salt Stress

Agronomy

Wheat growth, development and yield are severely affected by a wide range of abiotic stresses, an... more Wheat growth, development and yield are severely affected by a wide range of abiotic stresses, and salt stress is a vital and increasing abiotic stress. Salicylic acid (SA) is a phenolic phytohormone involved in plant physiological processes. Hence, we have conducted an experiment to explore the roles of exogenous SA in mitigating salt stress in two wheat genotypes. There were eight treatments comprising (i) control, (ii) 0.5 mM SA, (iii) 1.0 mM SA, (iv) 1.5 mM SA, (v) salinity (12 dS m−1), (vi) salinity + 0.5 mM SA, (vii) salinity + 1.0 mM SA and (viii) salinity + 1.5 mM SA with two wheat genotypes viz G 200-4 and BARI gom-25. The experiment was laid out in a completely randomized design with five replications. During the vegetative stage, salt stress significantly reduced the relative water content (RWC), photosynthetic rate, stomatal conductance and growth characteristics of both wheat genotypes, while the exogenous application of SA in salt-stressed plants significantly improved...

Research paper thumbnail of Foliar-applied boron improves flag leaf reserves translocation, pollen viability and yield of aromatic monsoon rice

Fundamental and Applied Agriculture, 2021

The planting of monsoon rice (locally known as aman rice) may be delayed due to late heavy rainfa... more The planting of monsoon rice (locally known as aman rice) may be delayed due to late heavy rainfall in many regions of South and Southeast Asia resulting in high spikelet sterility with substantial yield loss due to low temperatures during the reproductive stage. Therefore, the study evaluated the performance of foliar-applied boron in mitigating that problem towards sustainable aman rice production. A field experiment was laid out in a randomized complete block design where different levels of boron viz. 0, 50, 100, 150, 200, and 250 ppm were foliar-sprayed at 33 and 47 days after transplanting (DAT) to a popular aromatic rice cultivar Kataribhog grown in late monsoon. Data were collected on phenology, SPAD value at variable dates, pollen viability, boron concentration in leaves and grains, and yield traits and yield. The pollen viability increased by 81.6% for 200 ppm boron. Boron decreased flag leaf weight but increased panicle weight. Simultaneously, it decreased flag leaf SPAD ...

Research paper thumbnail of Biostimulant red seaweed (Gracilaria tenuistipitata var. liui) extracts spray improves yield and drought tolerance in soybean

PeerJ

Drought has a deleterious impact on the growth, physiology, and yield of various plants, includin... more Drought has a deleterious impact on the growth, physiology, and yield of various plants, including soybean. Seaweed extracts are rich in various bioactive compounds, including antioxidants, and can be used as biostimulants for improving yield and alleviating the adverse effect of drought stress. The purpose of this study was to evaluate the effect of soybean growth and yield with different concentrations (0.0%, 5.0%, and 10.0% v/v) of water extracts of the red seaweed Gracilaria tenuistipitata var. liui under well-watered (80% of field capacity (FC) and drought (40% of FC)) conditions. Drought stress decreased soybean grain yield by 45.58% compared to well-watered circumstances but increased the water saturation deficit by 37.87%. It also decreased leaf water, chlorophyll content, plant height, and the fresh weight of the leaf, stem, and petiole. Drought stress decreased soybean grain yield by 45.58% compared to well-watered circumstances but increased the water saturation deficit b...

Research paper thumbnail of Relationship between yield and its component characters of bush bean (Phaseolus vulgaris L.)

Relationship between yield and its component characters of twenty seven bush bean (Phaseolus vulg... more Relationship between yield and its component characters of twenty seven bush bean (Phaseolus vulgaris L.) genotypes were studied during November 2002 to February 2003. Ten characters were studied to idena tify suitable traits for yield improvement of this crop. Significant ...

Research paper thumbnail of Allelopathic Potential of Sunflower Extract on Weed Control and Wheat Yield Under Subtropical Conditions

International Journal of Applied Agricultural Sciences

A field experiment was conducted to evaluate the effect of sunflower plant extract on weed contro... more A field experiment was conducted to evaluate the effect of sunflower plant extract on weed control and productivity of wheat. Dried and fresh sunflower plant extracts (SPE) were applied @ 5 t ha-1 and 10 t ha-1 at pre-and post-emergence of weeds in wheat plots. In addition, weed free, manual weeding and unweeded control treatments were also imposed in the experiment. Application of fresh SPE @ 10 t ha-1 at post-emergence contributed to the highest weed control efficiency, next to manual weed control treatment throughout the crop growing period. This treatment showed the highest weed control efficiency of 49.71% and 53.41% at 45 and 60 days after sowing, respectively. Application of fresh SPE @ 5 t ha-1 at post-emergence was found to be beneficial on the growth and development of wheat compared to other treatments. Apart from weed free and unweeded situations, the highest grain yield of 3.91 t ha-1 was recorded in the treatment receiving fresh SPE @ 5 t ha-1 applied at post-emergence. The study further suggested that the application of fresh sunflower plant extract @ 5 ha-1 during post-emergence might be considered as a viable alternative to traditional weed management practices under subtropical environment.

Research paper thumbnail of Chlorophyll Meter-Based Dynamic Nitrogen Management in Wheat (Triticum aestivum L.) Under Subtropical Environment

Current Agriculture Research Journal, 2016

Injudicious use of nitrogen fertilizer is very commonly practice in tropical and subtropical regi... more Injudicious use of nitrogen fertilizer is very commonly practice in tropical and subtropical regions. SPAD (Soil-Plant Analysis Development) chlorophyll meter-based nitrogen top-dressing may reduce the risk of under or over application. Considering this, the study was conducted to measure the relative advantage of dynamic methods of nitrogen fertilization over conventional method in wheat field. For this, conventional nitrogen (CN) treatments i.e. CN60, CN90, CN120, CN150 at 60, 90, 120 and 150 kg ha-1 were compared with four chlorophyll meter-based dynamic nitrogen (DN) treatments i.e. DN80, DN90, DN120, DN100 at 80, 90, 120 and 100 kg ha-1 nitrogen. Irrespective of treatments, SPAD meter readings remained above 45 (threshold value) beyond 50 days after seeding, but plant performance varied depending on the methods and doses used in nitrogen top-dressing. Treatment CN150 performed better displaying the highest SPAD values, total dry matter production, leaf area index, crop growth r...

Research paper thumbnail of Effect of Weed Management Practices on Transplanted Aman Rice

Journal of Agronomy, 2005

Research paper thumbnail of Effect of water management and weed control treatments on the performance of transplanted <i>aman</i> rice

Bangladesh Journal of Agricultural Research, 2008

A study was conducted from June to December 2003 to assess weed dynamics and yield performance of... more A study was conducted from June to December 2003 to assess weed dynamics and yield performance of transplanted aman rice (cv. BRRI Dhan39) in different weed control treatments e.g. two hand weedings at 15 and 40 DAT; Weeding by BRRI Weeder at 20 and 40 DAT; Rifit 500EC @ 1L/ha at 7 DAT; Rifit 500EC @ 1 L/ha at 7 DAT and one hand weeding at 40 DAT; Butachlor 5G @ 2 kg/ha at 7 DAT; Butachlor 5G @ 2 kg/ha at 7 DAT and one hand weeding at 40 DAT along with weed free and unweeded check under both good and poor water management practices. Weed density, weed biomass and weed control efficiency were significantly influenced by different weed control treatments under both water management practices. Other than weed free treatment, Butachlor 5G @ 2 kg/ha applied at 7 DAT along with one hand weeding at 40 DAT showed the best performance under good water management with minimum weed density (16 g/m2) as well as weed biomass (9.27 g/m2) and the highest weed control efficiency (82.57%). Yield and...

Research paper thumbnail of Effect of sowing time and cultivars on the growth and yield of chickpea under rainfed condition

Bangladesh Journal of …, 2010

A study was conducted to see the effect of sowing time and cultivars on the growth and yield perf... more A study was conducted to see the effect of sowing time and cultivars on the growth and yield performance of chickpea under rainfed condition. Three chickpea varieties viz., BARI Chola-2, BARI Chola-4, and BARI Chloa-6, and five different sowing times viz.

Research paper thumbnail of Effect of Herbicide Dose and Water Management on Weed Control Efficiency and Yield Performance of Boro Rice

An experiment was conducted at the Experimental Farm of the Bangabandhu Sheikh Mujibur Rahman Agr... more An experiment was conducted at the Experimental Farm of the Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Salna, Gazipur during November 2011 to May 2012 to determine the effect of pre-emergence herbicide Pretilachlor @ 75%, 100%, 125%, 150%, 175% and 200% of the recommended dose under two water management regime i.e. continuous flooding and field capacity on weed suppression and yield performance of Boro rice cv. BRRIdhan28. One weed free and one control (unweeded) treatment were also imposed for treatment comparison. The experiment was laid down in Split Plot design with three replications. Standard management practices for transplanted rice were followed. Continuous flooding was found to contribute better weed control efficiency than field capacity. At 60 DAT, the highest weed control efficiency of 65.75% was found in the treatment receiving Pretilachlor @ 125% of the recommended dose under continuous flooding and the least (54.76%) was found in the treatment receiving 75% of the recommended dose under field capacity. Continuous flooding contributed to more tillers than field capacity, and herbicide up to 125% of the recommended dose enhanced tillering in rice. At 75DAT the highest number of tillers (17.53 hill-1) were found in the plots receiving Pretilachlor @ 125% of the recommended dose under good water management (W1T3), while the lowest (11.10 hill-1) was recorded in W2T6 treatment receiving Pretilachlor @ 200% of the recommended dose under field capacity. The highest tiller mortality (27.90%) was observed in W1T3 treatment, whereas the least (8.06%) was observed in W2T5 treatment receiving the same herbicide @175% of the recommended dose under field capacity. Application of Pretilachlor at recommended dose under continuous flooding contributed to the highest crop dry matter production (1144.60g m-2) thus leading to the highest grain yield of 6.31 t ha-1 being followed by the treatment receiving Pretilachlor @ 125% of the recommended dose under same water management yielding 5.95 t ha-1 along with the highest harvest index of 0.58. Results revealed that Pretilachlor at recommended dose might be considered as viable option for weed management in transplanted Boro rice cultivation for effective weed management and satisfactory grain yield provided that appropriate water management is adopted.

Research paper thumbnail of Evaluation of yield and yield-related traits for waterlogging tolerance in mungbean genotypes using multivariate techniques

Journal of Agricultural Sciences, Belgrade

Waterlogging is a major constraint of mungbean production in the tropical and subtropical regions... more Waterlogging is a major constraint of mungbean production in the tropical and subtropical regions of the world and can cause a significant yield loss. The study evaluated 100 mungbean genotypes for tolerance to waterlogging employing rigorous field screening procedures. Three-week-old seedlings of 100 mungbean genotypes were subjected to waterlogging for 3 days maintaining a waterlogging depth of 2.5 cm. Waterlogging tolerance was evaluated during the periods of recovery and final harvest considering relative performance (values of waterlogging relative to non-waterlogging controls) of 18 plant traits. All the genotypes showed a wide range of variation in relative values. Some genotypes subjected to waterlogging produced plenty of adventitious roots that contributed to foliage development and chlorophyll increment, which resulted in better shoot growth, and eventually yield of mungbean increased. Nine plant traits highly associated in waterlogged conditions were used in cluster anal...

Research paper thumbnail of Growth and yield performance of selected wheat varieties under water deficit conditions

Bangladesh Journal of Scientific Research, 2017

Effect of water deficit stress on growth and yield of three wheat (Triticum aestivum) varieties, ... more Effect of water deficit stress on growth and yield of three wheat (Triticum aestivum) varieties, viz. BARI Gom 25, BARI Gom 26 and Sourav was studied. Water deficit lowered the light interception at anthesis in wheat. Under water deficit condition, the highest amount of PAR interception was recorded in BARI Gom 26. The reduction of leaf area index (LAI), crop growth rate (CGR), relative growth rate (RGR) and net assimilation rate (NAR) were less in BARI Gom 26. Water deficit conditions lowered the SPAD values in all the three wheat varieties. BARI Gom 26 showed less reduction, while BARI Gom 25 reflected the highest reduction in SPAD value under water deficit condition. Under water deficit condition the maximum number of spikelets/spike, 1000grain weight and HI were recorded in BARI Gom 26 and the minimum in BARI Gom 25. Under both control and water deficit conditions BARI Gom 26 gave the highest grain yield, while the lowest grain yield was obtained from BARI Gom 25.

Research paper thumbnail of Evaluation of Selected Herbicides on Weed Control Efficiency and Yield of Wheat

Journal of Science Foundation, 2016

Background: Weed control is an important issue for the proper growth of wheat. Objective: The pur... more Background: Weed control is an important issue for the proper growth of wheat. Objective: The purpose of the present study was to see the effect of selected herbicides on weed infestation behavior in wheat field; to determine the effect of herbicides on growth and development of wheat plants, and to evaluate the effect of herbicides on yield performance of wheat. Methodology: A field experiment was conducted at the Experimental Farm of the Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur, Bangladesh during November to May 2011-2012. Four herbicides were tested at recommended dose alone and also coupled with supplemental hand weeding in wheat crop. In addition, a weedy check (control) was also imposed for treatment comparison. The herbicides were Pendimethalin, Carfentrazone-ethyl + Isoproturon, Carfentrazone-ethyl and 2,4-D. In this way, nine treatment combinations were arranged in the RCBD experiment with three replications. Result: Carfentrazone-ethyl performed the best in terms of weed control efficiency (79.68%), while Pendimethalin performed the worst (52.74%). Carfentrazone-ethyl + Isoproteuron contributed to the highest tillers per unit area (226.3 m-2) and the highest total dry matter (1342 g m-2). Finally, Carfentrazone-ethyl + Isoproteuron also contributed to the highest grain yield of 3.56 t ha-1 with the highest harvest index of 0.42. Carfentrazone-ethyl + Isoproteuron accompanied by one hand weeding also contributed to statistically identical grain yield of 3.33 t ha-1. Single ingredient Carfentrazone-ethyl alone and when accompanied with one hand weeding also contributed to statistically identical grain yields of 3.26 t ha-1 and 3.46 t ha-1 , respectively. Conclusion: The study revealed that, combined ingredient herbicide Carfentrazone-ethyl + Isoproteuron as well as Carfentrazone-ethyl alone might used at field level due to their better weed control efficiency, favourable effect on crop growth and development and higher grain yield.

Research paper thumbnail of Sundarbans in Bangladesh: Land Use and Its Impacts

… Knowledge for Managing Biosphere Reserves in …, 2002

Research paper thumbnail of Agriculture in the Fragile Environment of Bangladesh: Looking into the Future

... Looking into the Future M. Giashuddin Miah 1 , M. Nasimul Bari 1 , Tofayel Ahamed 1 and Uttam... more ... Looking into the Future M. Giashuddin Miah 1 , M. Nasimul Bari 1 , Tofayel Ahamed 1 and Uttam Saha 2 1 BSMR Agricultural University, Gazipur-1706, Bangladesh, ... In crop sector, rice occupies 71 % of the gross cropped area and accounts for over 97% of total food production. ...

Research paper thumbnail of Resource degradation and livelihood in the coastal region of Bangladesh

A study was conducted in four selected upazilas under four coastal districts through participator... more A study was conducted in four selected upazilas under four coastal districts through participatory rural appraisal (PRA), household survey and monitoring, sampling, focal group discussions, personal interview, onfarm field visits, institutional consultations, and secondary information. The investigation revealed that the valuable natural resources of the whole region are at the verge of serious degradation. Various causes have been identified, which are responsible for degradation of both resources and production environments. These causes include human population growth, coastal embankment, upstream withdrawal of Ganges water, brackish water shrimp farming, salt production, use of agro-chemicals, industrial activities, commercial activities, over-exploitation, etc. The study also showed that the degradation of natural resources is the reason behind the squeezing of historically dominant livelihood opportunities of the coastal communities. The current scenarios of the coastal ecosystem urge necessary steps to be taken for sustainable management of valuable resources and to create alternative livelihood opportunities for the coastal communities.

Research paper thumbnail of Effect of Herbicide Dose and Water Management on Weed Control Efficiency and Yield Performance of Boro Rice

Journal of Science Foundation, 2016

An experiment was conducted at the Experimental Farm of the Bangabandhu Sheikh Mujibur Rahman Agr... more An experiment was conducted at the Experimental Farm of the Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Salna, Gazipur during November 2011 to May 2012 to determine the effect of pre-emergence herbicide Pretilachlor @ 75%, 100%, 125%, 150%, 175% and 200% of the recommended dose under two water management regime i.e. continuous flooding and field capacity on weed suppression and yield performance of Boro rice cv. BRRIdhan28. One weed free and one control (unweeded) treatment were also imposed for treatment comparison. The experiment was laid down in Split Plot design with three replications. Standard management practices for transplanted rice were followed. Continuous flooding was found to contribute better weed control efficiency than field capacity. At 60 DAT, the highest weed control efficiency of 65.75% was found in the treatment receiving Pretilachlor @ 125% of the recommended dose under continuous flooding and the least (54.76%) was found in the treatment receiving 75% of the recommended dose under field capacity. Continuous flooding contributed to more tillers than field capacity, and herbicide up to 125% of the recommended dose enhanced tillering in rice. At 75DAT the highest number of tillers (17.53 hill-1) were found in the plots receiving Pretilachlor @ 125% of the recommended dose under good water management (W1T3), while the lowest (11.10 hill-1) was recorded in W2T6 treatment receiving Pretilachlor @ 200% of the recommended dose under field capacity. The highest tiller mortality (27.90%) was observed in W1T3 treatment, whereas the least (8.06%) was observed in W2T5 treatment receiving the same herbicide @175% of the recommended dose under field capacity. Application of Pretilachlor at recommended dose under continuous flooding contributed to the highest crop dry matter production (1144.60g m-2) thus leading to the highest grain yield of 6.31 t ha-1 being followed by the treatment receiving Pretilachlor @ 125% of the recommended dose under same water management yielding 5.95 t ha-1 along with the highest harvest index of 0.58. Results revealed that Pretilachlor at recommended dose might be considered as viable option for weed management in transplanted Boro rice cultivation for effective weed management and satisfactory grain yield provided that appropriate water management is adopted.

Research paper thumbnail of Linking Farmers and Scientists: Participatory selection of mungbean variety for cereal-based cropping system in the north-western region of Bangladesh

Research paper thumbnail of Agricultural Activities and Their Impacts on the Ecology and Biodiversity of the Sundarbans Area of Bangladesh

Journal of the National Science Foundation of Sri Lanka, 2011

... problems were increased soil and water salinity, deterioration of soil fertility and producti... more ... problems were increased soil and water salinity, deterioration of soil fertility and productivity,pollution of soil and water ecosystems and loss ... Rationale of the Study ... It is located in the southwestern part of Bangladesh, and offers coastal protection to the Southwest of Bangladesh. ...

Research paper thumbnail of Allelopathic Potential of Sunflower Extract on Weed Control and Wheat Yield Under Subtropical Conditions

International Journal of Applied Agricultural Sciences, 2016

A field experiment was conducted to evaluate the effect of sunflower plant extract on weed contro... more A field experiment was conducted to evaluate the effect of sunflower plant extract on weed control and productivity of wheat. Dried and fresh sunflower plant extracts (SPE) were applied @ 5 t ha-1 and 10 t ha-1 at pre-and post-emergence of weeds in wheat plots. In addition, weed free, manual weeding and unweeded control treatments were also imposed in the experiment. Application of fresh SPE @ 10 t ha-1 at post-emergence contributed to the highest weed control efficiency, next to manual weed control treatment throughout the crop growing period. This treatment showed the highest weed control efficiency of 49.71% and 53.41% at 45 and 60 days after sowing, respectively. Application of fresh SPE @ 5 t ha-1 at post-emergence was found to be beneficial on the growth and development of wheat compared to other treatments. Apart from weed free and unweeded situations, the highest grain yield of 3.91 t ha-1 was recorded in the treatment receiving fresh SPE @ 5 t ha-1 applied at post-emergence. The study further suggested that the application of fresh sunflower plant extract @ 5 ha-1 during post-emergence might be considered as a viable alternative to traditional weed management practices under subtropical environment.

Research paper thumbnail of Salicylic Acid Improves Agro-Morphology, Yield and Ion Accumulation of Two Wheat (Triticum aestivum L.) Genotypes by Ameliorating the Impact of Salt Stress

Agronomy

Wheat growth, development and yield are severely affected by a wide range of abiotic stresses, an... more Wheat growth, development and yield are severely affected by a wide range of abiotic stresses, and salt stress is a vital and increasing abiotic stress. Salicylic acid (SA) is a phenolic phytohormone involved in plant physiological processes. Hence, we have conducted an experiment to explore the roles of exogenous SA in mitigating salt stress in two wheat genotypes. There were eight treatments comprising (i) control, (ii) 0.5 mM SA, (iii) 1.0 mM SA, (iv) 1.5 mM SA, (v) salinity (12 dS m−1), (vi) salinity + 0.5 mM SA, (vii) salinity + 1.0 mM SA and (viii) salinity + 1.5 mM SA with two wheat genotypes viz G 200-4 and BARI gom-25. The experiment was laid out in a completely randomized design with five replications. During the vegetative stage, salt stress significantly reduced the relative water content (RWC), photosynthetic rate, stomatal conductance and growth characteristics of both wheat genotypes, while the exogenous application of SA in salt-stressed plants significantly improved...

Research paper thumbnail of Foliar-applied boron improves flag leaf reserves translocation, pollen viability and yield of aromatic monsoon rice

Fundamental and Applied Agriculture, 2021

The planting of monsoon rice (locally known as aman rice) may be delayed due to late heavy rainfa... more The planting of monsoon rice (locally known as aman rice) may be delayed due to late heavy rainfall in many regions of South and Southeast Asia resulting in high spikelet sterility with substantial yield loss due to low temperatures during the reproductive stage. Therefore, the study evaluated the performance of foliar-applied boron in mitigating that problem towards sustainable aman rice production. A field experiment was laid out in a randomized complete block design where different levels of boron viz. 0, 50, 100, 150, 200, and 250 ppm were foliar-sprayed at 33 and 47 days after transplanting (DAT) to a popular aromatic rice cultivar Kataribhog grown in late monsoon. Data were collected on phenology, SPAD value at variable dates, pollen viability, boron concentration in leaves and grains, and yield traits and yield. The pollen viability increased by 81.6% for 200 ppm boron. Boron decreased flag leaf weight but increased panicle weight. Simultaneously, it decreased flag leaf SPAD ...

Research paper thumbnail of Biostimulant red seaweed (Gracilaria tenuistipitata var. liui) extracts spray improves yield and drought tolerance in soybean

PeerJ

Drought has a deleterious impact on the growth, physiology, and yield of various plants, includin... more Drought has a deleterious impact on the growth, physiology, and yield of various plants, including soybean. Seaweed extracts are rich in various bioactive compounds, including antioxidants, and can be used as biostimulants for improving yield and alleviating the adverse effect of drought stress. The purpose of this study was to evaluate the effect of soybean growth and yield with different concentrations (0.0%, 5.0%, and 10.0% v/v) of water extracts of the red seaweed Gracilaria tenuistipitata var. liui under well-watered (80% of field capacity (FC) and drought (40% of FC)) conditions. Drought stress decreased soybean grain yield by 45.58% compared to well-watered circumstances but increased the water saturation deficit by 37.87%. It also decreased leaf water, chlorophyll content, plant height, and the fresh weight of the leaf, stem, and petiole. Drought stress decreased soybean grain yield by 45.58% compared to well-watered circumstances but increased the water saturation deficit b...

Research paper thumbnail of Relationship between yield and its component characters of bush bean (Phaseolus vulgaris L.)

Relationship between yield and its component characters of twenty seven bush bean (Phaseolus vulg... more Relationship between yield and its component characters of twenty seven bush bean (Phaseolus vulgaris L.) genotypes were studied during November 2002 to February 2003. Ten characters were studied to idena tify suitable traits for yield improvement of this crop. Significant ...

Research paper thumbnail of Allelopathic Potential of Sunflower Extract on Weed Control and Wheat Yield Under Subtropical Conditions

International Journal of Applied Agricultural Sciences

A field experiment was conducted to evaluate the effect of sunflower plant extract on weed contro... more A field experiment was conducted to evaluate the effect of sunflower plant extract on weed control and productivity of wheat. Dried and fresh sunflower plant extracts (SPE) were applied @ 5 t ha-1 and 10 t ha-1 at pre-and post-emergence of weeds in wheat plots. In addition, weed free, manual weeding and unweeded control treatments were also imposed in the experiment. Application of fresh SPE @ 10 t ha-1 at post-emergence contributed to the highest weed control efficiency, next to manual weed control treatment throughout the crop growing period. This treatment showed the highest weed control efficiency of 49.71% and 53.41% at 45 and 60 days after sowing, respectively. Application of fresh SPE @ 5 t ha-1 at post-emergence was found to be beneficial on the growth and development of wheat compared to other treatments. Apart from weed free and unweeded situations, the highest grain yield of 3.91 t ha-1 was recorded in the treatment receiving fresh SPE @ 5 t ha-1 applied at post-emergence. The study further suggested that the application of fresh sunflower plant extract @ 5 ha-1 during post-emergence might be considered as a viable alternative to traditional weed management practices under subtropical environment.

Research paper thumbnail of Chlorophyll Meter-Based Dynamic Nitrogen Management in Wheat (Triticum aestivum L.) Under Subtropical Environment

Current Agriculture Research Journal, 2016

Injudicious use of nitrogen fertilizer is very commonly practice in tropical and subtropical regi... more Injudicious use of nitrogen fertilizer is very commonly practice in tropical and subtropical regions. SPAD (Soil-Plant Analysis Development) chlorophyll meter-based nitrogen top-dressing may reduce the risk of under or over application. Considering this, the study was conducted to measure the relative advantage of dynamic methods of nitrogen fertilization over conventional method in wheat field. For this, conventional nitrogen (CN) treatments i.e. CN60, CN90, CN120, CN150 at 60, 90, 120 and 150 kg ha-1 were compared with four chlorophyll meter-based dynamic nitrogen (DN) treatments i.e. DN80, DN90, DN120, DN100 at 80, 90, 120 and 100 kg ha-1 nitrogen. Irrespective of treatments, SPAD meter readings remained above 45 (threshold value) beyond 50 days after seeding, but plant performance varied depending on the methods and doses used in nitrogen top-dressing. Treatment CN150 performed better displaying the highest SPAD values, total dry matter production, leaf area index, crop growth r...

Research paper thumbnail of Effect of Weed Management Practices on Transplanted Aman Rice

Journal of Agronomy, 2005

Research paper thumbnail of Effect of water management and weed control treatments on the performance of transplanted <i>aman</i> rice

Bangladesh Journal of Agricultural Research, 2008

A study was conducted from June to December 2003 to assess weed dynamics and yield performance of... more A study was conducted from June to December 2003 to assess weed dynamics and yield performance of transplanted aman rice (cv. BRRI Dhan39) in different weed control treatments e.g. two hand weedings at 15 and 40 DAT; Weeding by BRRI Weeder at 20 and 40 DAT; Rifit 500EC @ 1L/ha at 7 DAT; Rifit 500EC @ 1 L/ha at 7 DAT and one hand weeding at 40 DAT; Butachlor 5G @ 2 kg/ha at 7 DAT; Butachlor 5G @ 2 kg/ha at 7 DAT and one hand weeding at 40 DAT along with weed free and unweeded check under both good and poor water management practices. Weed density, weed biomass and weed control efficiency were significantly influenced by different weed control treatments under both water management practices. Other than weed free treatment, Butachlor 5G @ 2 kg/ha applied at 7 DAT along with one hand weeding at 40 DAT showed the best performance under good water management with minimum weed density (16 g/m2) as well as weed biomass (9.27 g/m2) and the highest weed control efficiency (82.57%). Yield and...

Research paper thumbnail of Effect of sowing time and cultivars on the growth and yield of chickpea under rainfed condition

Bangladesh Journal of …, 2010

A study was conducted to see the effect of sowing time and cultivars on the growth and yield perf... more A study was conducted to see the effect of sowing time and cultivars on the growth and yield performance of chickpea under rainfed condition. Three chickpea varieties viz., BARI Chola-2, BARI Chola-4, and BARI Chloa-6, and five different sowing times viz.

Research paper thumbnail of Effect of Herbicide Dose and Water Management on Weed Control Efficiency and Yield Performance of Boro Rice

An experiment was conducted at the Experimental Farm of the Bangabandhu Sheikh Mujibur Rahman Agr... more An experiment was conducted at the Experimental Farm of the Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Salna, Gazipur during November 2011 to May 2012 to determine the effect of pre-emergence herbicide Pretilachlor @ 75%, 100%, 125%, 150%, 175% and 200% of the recommended dose under two water management regime i.e. continuous flooding and field capacity on weed suppression and yield performance of Boro rice cv. BRRIdhan28. One weed free and one control (unweeded) treatment were also imposed for treatment comparison. The experiment was laid down in Split Plot design with three replications. Standard management practices for transplanted rice were followed. Continuous flooding was found to contribute better weed control efficiency than field capacity. At 60 DAT, the highest weed control efficiency of 65.75% was found in the treatment receiving Pretilachlor @ 125% of the recommended dose under continuous flooding and the least (54.76%) was found in the treatment receiving 75% of the recommended dose under field capacity. Continuous flooding contributed to more tillers than field capacity, and herbicide up to 125% of the recommended dose enhanced tillering in rice. At 75DAT the highest number of tillers (17.53 hill-1) were found in the plots receiving Pretilachlor @ 125% of the recommended dose under good water management (W1T3), while the lowest (11.10 hill-1) was recorded in W2T6 treatment receiving Pretilachlor @ 200% of the recommended dose under field capacity. The highest tiller mortality (27.90%) was observed in W1T3 treatment, whereas the least (8.06%) was observed in W2T5 treatment receiving the same herbicide @175% of the recommended dose under field capacity. Application of Pretilachlor at recommended dose under continuous flooding contributed to the highest crop dry matter production (1144.60g m-2) thus leading to the highest grain yield of 6.31 t ha-1 being followed by the treatment receiving Pretilachlor @ 125% of the recommended dose under same water management yielding 5.95 t ha-1 along with the highest harvest index of 0.58. Results revealed that Pretilachlor at recommended dose might be considered as viable option for weed management in transplanted Boro rice cultivation for effective weed management and satisfactory grain yield provided that appropriate water management is adopted.

Research paper thumbnail of Evaluation of yield and yield-related traits for waterlogging tolerance in mungbean genotypes using multivariate techniques

Journal of Agricultural Sciences, Belgrade

Waterlogging is a major constraint of mungbean production in the tropical and subtropical regions... more Waterlogging is a major constraint of mungbean production in the tropical and subtropical regions of the world and can cause a significant yield loss. The study evaluated 100 mungbean genotypes for tolerance to waterlogging employing rigorous field screening procedures. Three-week-old seedlings of 100 mungbean genotypes were subjected to waterlogging for 3 days maintaining a waterlogging depth of 2.5 cm. Waterlogging tolerance was evaluated during the periods of recovery and final harvest considering relative performance (values of waterlogging relative to non-waterlogging controls) of 18 plant traits. All the genotypes showed a wide range of variation in relative values. Some genotypes subjected to waterlogging produced plenty of adventitious roots that contributed to foliage development and chlorophyll increment, which resulted in better shoot growth, and eventually yield of mungbean increased. Nine plant traits highly associated in waterlogged conditions were used in cluster anal...

Research paper thumbnail of Growth and yield performance of selected wheat varieties under water deficit conditions

Bangladesh Journal of Scientific Research, 2017

Effect of water deficit stress on growth and yield of three wheat (Triticum aestivum) varieties, ... more Effect of water deficit stress on growth and yield of three wheat (Triticum aestivum) varieties, viz. BARI Gom 25, BARI Gom 26 and Sourav was studied. Water deficit lowered the light interception at anthesis in wheat. Under water deficit condition, the highest amount of PAR interception was recorded in BARI Gom 26. The reduction of leaf area index (LAI), crop growth rate (CGR), relative growth rate (RGR) and net assimilation rate (NAR) were less in BARI Gom 26. Water deficit conditions lowered the SPAD values in all the three wheat varieties. BARI Gom 26 showed less reduction, while BARI Gom 25 reflected the highest reduction in SPAD value under water deficit condition. Under water deficit condition the maximum number of spikelets/spike, 1000grain weight and HI were recorded in BARI Gom 26 and the minimum in BARI Gom 25. Under both control and water deficit conditions BARI Gom 26 gave the highest grain yield, while the lowest grain yield was obtained from BARI Gom 25.

Research paper thumbnail of Evaluation of Selected Herbicides on Weed Control Efficiency and Yield of Wheat

Journal of Science Foundation, 2016

Background: Weed control is an important issue for the proper growth of wheat. Objective: The pur... more Background: Weed control is an important issue for the proper growth of wheat. Objective: The purpose of the present study was to see the effect of selected herbicides on weed infestation behavior in wheat field; to determine the effect of herbicides on growth and development of wheat plants, and to evaluate the effect of herbicides on yield performance of wheat. Methodology: A field experiment was conducted at the Experimental Farm of the Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur, Bangladesh during November to May 2011-2012. Four herbicides were tested at recommended dose alone and also coupled with supplemental hand weeding in wheat crop. In addition, a weedy check (control) was also imposed for treatment comparison. The herbicides were Pendimethalin, Carfentrazone-ethyl + Isoproturon, Carfentrazone-ethyl and 2,4-D. In this way, nine treatment combinations were arranged in the RCBD experiment with three replications. Result: Carfentrazone-ethyl performed the best in terms of weed control efficiency (79.68%), while Pendimethalin performed the worst (52.74%). Carfentrazone-ethyl + Isoproteuron contributed to the highest tillers per unit area (226.3 m-2) and the highest total dry matter (1342 g m-2). Finally, Carfentrazone-ethyl + Isoproteuron also contributed to the highest grain yield of 3.56 t ha-1 with the highest harvest index of 0.42. Carfentrazone-ethyl + Isoproteuron accompanied by one hand weeding also contributed to statistically identical grain yield of 3.33 t ha-1. Single ingredient Carfentrazone-ethyl alone and when accompanied with one hand weeding also contributed to statistically identical grain yields of 3.26 t ha-1 and 3.46 t ha-1 , respectively. Conclusion: The study revealed that, combined ingredient herbicide Carfentrazone-ethyl + Isoproteuron as well as Carfentrazone-ethyl alone might used at field level due to their better weed control efficiency, favourable effect on crop growth and development and higher grain yield.

Research paper thumbnail of Sundarbans in Bangladesh: Land Use and Its Impacts

… Knowledge for Managing Biosphere Reserves in …, 2002

Research paper thumbnail of Agriculture in the Fragile Environment of Bangladesh: Looking into the Future

... Looking into the Future M. Giashuddin Miah 1 , M. Nasimul Bari 1 , Tofayel Ahamed 1 and Uttam... more ... Looking into the Future M. Giashuddin Miah 1 , M. Nasimul Bari 1 , Tofayel Ahamed 1 and Uttam Saha 2 1 BSMR Agricultural University, Gazipur-1706, Bangladesh, ... In crop sector, rice occupies 71 % of the gross cropped area and accounts for over 97% of total food production. ...

Research paper thumbnail of Resource degradation and livelihood in the coastal region of Bangladesh

A study was conducted in four selected upazilas under four coastal districts through participator... more A study was conducted in four selected upazilas under four coastal districts through participatory rural appraisal (PRA), household survey and monitoring, sampling, focal group discussions, personal interview, onfarm field visits, institutional consultations, and secondary information. The investigation revealed that the valuable natural resources of the whole region are at the verge of serious degradation. Various causes have been identified, which are responsible for degradation of both resources and production environments. These causes include human population growth, coastal embankment, upstream withdrawal of Ganges water, brackish water shrimp farming, salt production, use of agro-chemicals, industrial activities, commercial activities, over-exploitation, etc. The study also showed that the degradation of natural resources is the reason behind the squeezing of historically dominant livelihood opportunities of the coastal communities. The current scenarios of the coastal ecosystem urge necessary steps to be taken for sustainable management of valuable resources and to create alternative livelihood opportunities for the coastal communities.

Research paper thumbnail of Effect of Herbicide Dose and Water Management on Weed Control Efficiency and Yield Performance of Boro Rice

Journal of Science Foundation, 2016

An experiment was conducted at the Experimental Farm of the Bangabandhu Sheikh Mujibur Rahman Agr... more An experiment was conducted at the Experimental Farm of the Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Salna, Gazipur during November 2011 to May 2012 to determine the effect of pre-emergence herbicide Pretilachlor @ 75%, 100%, 125%, 150%, 175% and 200% of the recommended dose under two water management regime i.e. continuous flooding and field capacity on weed suppression and yield performance of Boro rice cv. BRRIdhan28. One weed free and one control (unweeded) treatment were also imposed for treatment comparison. The experiment was laid down in Split Plot design with three replications. Standard management practices for transplanted rice were followed. Continuous flooding was found to contribute better weed control efficiency than field capacity. At 60 DAT, the highest weed control efficiency of 65.75% was found in the treatment receiving Pretilachlor @ 125% of the recommended dose under continuous flooding and the least (54.76%) was found in the treatment receiving 75% of the recommended dose under field capacity. Continuous flooding contributed to more tillers than field capacity, and herbicide up to 125% of the recommended dose enhanced tillering in rice. At 75DAT the highest number of tillers (17.53 hill-1) were found in the plots receiving Pretilachlor @ 125% of the recommended dose under good water management (W1T3), while the lowest (11.10 hill-1) was recorded in W2T6 treatment receiving Pretilachlor @ 200% of the recommended dose under field capacity. The highest tiller mortality (27.90%) was observed in W1T3 treatment, whereas the least (8.06%) was observed in W2T5 treatment receiving the same herbicide @175% of the recommended dose under field capacity. Application of Pretilachlor at recommended dose under continuous flooding contributed to the highest crop dry matter production (1144.60g m-2) thus leading to the highest grain yield of 6.31 t ha-1 being followed by the treatment receiving Pretilachlor @ 125% of the recommended dose under same water management yielding 5.95 t ha-1 along with the highest harvest index of 0.58. Results revealed that Pretilachlor at recommended dose might be considered as viable option for weed management in transplanted Boro rice cultivation for effective weed management and satisfactory grain yield provided that appropriate water management is adopted.

Research paper thumbnail of Linking Farmers and Scientists: Participatory selection of mungbean variety for cereal-based cropping system in the north-western region of Bangladesh

Research paper thumbnail of Agricultural Activities and Their Impacts on the Ecology and Biodiversity of the Sundarbans Area of Bangladesh

Journal of the National Science Foundation of Sri Lanka, 2011

... problems were increased soil and water salinity, deterioration of soil fertility and producti... more ... problems were increased soil and water salinity, deterioration of soil fertility and productivity,pollution of soil and water ecosystems and loss ... Rationale of the Study ... It is located in the southwestern part of Bangladesh, and offers coastal protection to the Southwest of Bangladesh. ...